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laitrhtatr Entrant @High iurnovsivie'ur In uoisriue APPARATUS.

dln Stlnhulr nient tu' in that ildtns gutrut :un mating-pint nt the simu.

TO ALL WIOM IT MAY GONCERN:

Be itlinown that I, ROGER FINNEGAN, ot' the city; county, and State of New York, have invented a lnew and improved Hoisting Apparatus; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skill'ed in the art to' make and use the same, reference heilig had to the accompanying drawings, forminga part of" this specification, in whiehl i Figure 1 represents a front elevation, partly in section, of my improved hoisting apparatus.

` Figure 2 isa vertical transverse section ot' the saine, the plane of section being indicated bythe line l: y Hg. 1. p

Figure 3 is a detail sectional view ofthe clamping device. Similar lett-ers of reference indicate corresponding parts. This invention relates to a new manner of operating a hoisting apparatus, andconsists in arranging a pair of oscillating clamps, which are iitted around the endless rope, bywhich tht` drum is revolved, and which can be set in motion by oscillating a horizontal axle. .The axleis by means of ropes connected with Ythe aforesaid clamps, and as it is oseillated it alternately throws one clamp into and the other out of gear with the end-V less rope. That clamp vwhiehis'made to grasp the rope at the same time drawn down, while thcrother free clamp is' moved up, to grasp the rope at ahigher point, and thus the endless rope is continually drawn over the drum, therebyrevoiving the same. l

A represents the drum of a hoisting apparatus mounted in a suitable frame, ll. C is the endless rope, pass ing around thcilrum. D D are two levers, pivoted each with one end to the frame B, while its other end, is provided with a tubular shank, a a', through which the rope passes. The lever D is arranged above the lever D, and theropepasses through both tubes (l and a. From each tube' project two (more or less) lugs b b, towards that side which is opposite to thcliody of. the lever-D D. 'lo these lugs are pivoted levers E E', the lever E to Dand the lever E to D', as shown. A curved cani, e, formed on the inner end of cach lever E E', fitsthrough a slot in each tube a rt into theA interior of tliesame. llic inner edge of this cam c is so arranged thnt'the rope is 'clamped between the lower end of the caniand the opposite side of thc tube, when the free end of the lever D or D"is"turned up, and that of the lever E or E forced down, as shown in figs. 1 and 3; while, when the free end of the lever D or D is forced down, andA that of the lever E or E pulled up, the edge of the cani e will be parallel with the opposite side of the tube a or a', and the rope G will therefore not be clamped bythe lever E or E', as shown at a, in figs. 1 and S. The free ends of the levers E and E are secured to a rope, l?, which is with both ends secured to a diskfG, mounted on or to two cranks, projecting from a horizontal shaft, H, the rope passing around a friction-roller, I. The levers E and E are secured to the two arms of the rope F, so that when the shaft ll is oseillated, the end of one lever will be raised, and that of the other will be lowered; thereby one lever, E enE, will, during every other stroke of the shaft II, be brought with its free end up, so as to grasp the rope C, while the other lever E orE is at the same time drawn down and releases the rope G. When, then, the shaft II is turned, the upward inclined lcvcr will be drawn down, carrying with it the rope C, while the downward inclined leverwill bedraivn up, without grasping the rope C, so as to bc v brought into position to clamp it during the next stroke.Y When-it is desired to release the rope C so as to funwind the hoisting-rope J from the drum A, it is only necessary to bring the two levers D E and D E' int-o nearly level positions7 and by then bearing upon the levers DD', near the tubes a, thereby the pivoted ends of the levers D D! and E E are inclined downwards, and the rope C is relieved. This can be done by connecting the levers Dhand D by means of a cord, K, as shown. The shaft II can'be setin motion directly or by means of gear-wheel,connections with another oscillating shaft, as may be desired. It willbc seen that by this arrangement much power is gained, and that the vrope C, when a weight is being elevated, is always clamped so that the use of a generally ineffective brake on the drum A is dispensed with. Thel tubes a are provided with setscrews d d, which can be screwed against the cams eso as te throw the same against the rope, in ease a thinner rope is employed, or draw it off where a thicker rope is used.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The levers D, and D', when provided with tubes a and a', in combination with the levers E and E', having eem-projections e, all made and operting substantially as herein slrow'n :mil will clamp the endlcs; rope C during every alternate stroke, as Seb fortli.

2. The levers D and D :mil E EIwhen arranged ns described, in combination with tb'e rope F and oseillating slmfl H, all made and operating substantially as herein shown and described.

The zumngen'ient` of the cord K, levers D D E E', unil tubeea a, specified.

el. Providing` ille tubes a a described.

described, so that each set of lei/ers with sot-screws rl, substnnt-inllyzrsand-for thepurposc herein shown and ROGER FINNEGAN.- Witnesses:

ALEX. F. loimnrs.

as llerein described for the purpse 

